IV. Correlative Conjunctions: Some conjunctions combine with other words to form what are calledcorrelative conjunctions. They always travel in pairs, joining various sentence elements that should be treated as grammatically equal.

She led the team not only in statistics but also by virtue of her enthusiasm.

Polonius said, "Neither a borrower nor a lender be."

Whether you win this race or lose it doesn't matter as long as you do your best.